Cutting-blade attachment



June 21,, 1927. 1,632,823

J. G. DARLING CUTTING BLADE ATTACHMENT Filed Aug. 19. 1925 2 Sheets-Sheet 1 firroR Y.

June 21 1927.

' J. G.' DARLING CUTTING BLADE ATTACHMENT Filed Aug. 19. 1925 2 Sheets-Sheet 2 INVENTOR.

Patented June 21, 1927.

I UNIT-El STATES 1,632,823 PATENT .o'rrlcs. 3

JAMES a. DARLINQOF, nonwoon, OHIO.

.GUTTING-BLADE ATTACHMENT.

Application filed August 19, 1925. Serial No 51,208.

My invention relates to cutting blade at tachments of the type set forth in Patent No. 1,359,339, granted William A. Darling, November 16, 1920.

The object of the present invention is to provide a simple, efficient, durable, and inexpensive cutting blade attachment. which is adapted to be readily and conveniently detachably secured toclawhammer heads of varying sizes and shapes without any eX- traneous fastening means and to be readily detached therefrom, when desired.

The invention consists in providing a blade similar in shape to a hatchet blade but recessed or dished at its back and having a curved widened bearing part and having spaced-apart holding pins whereby the claws of the hammer will bear against said curved part and between said spaced-apart pins and whereby said cutting blade is adapted to be securely held in operative position upon claw-hammer heads of varying sizes and shapes.

i My invention also consists in the peculiar construction, combination, and arrangement of parts, as set forth and claimed.

In the drawings:

Fig. 1 is a side view of the cutting blade attachment embodying my invention, applied in operative position to a hammer head;

Fig. 2 is a section taken on the line 22' of Fig. 1, looking in the direction of the arrows;

Fig. 3 is an isometric view of the cutting blade attachment;

Fig. 4 shows the manner of sliding the back of the blade. into the slot between the claws of the hammer and of sliding the claws of the hammer between the spacedapart pins to the position shown in Fig. 5;

Fig. 5 is a view showing it sliding into wedging engagement with the claws of the hammer and blade while giving it a slight tap wherebyjdt is firmly wedged and held upon the hammer claws;

Fig. 6 shows the blade detached and its manner of use as a chisel;

Fig. 7 shows the method ofiremoval or detachment of the blade from the hammer claws; i

Fig. 8 shows the attachment on the hammer while it is being used for pounding;

Fig. 9 shows its use for heavy cutting strokes; and

Fig. 10 shows its use as a hand blade for light .slivering or shavingc In the embodiment of my invention, as illustrated, and which shows a preferred construction, I provide cutting blade at tachment 1 of substantially the shape shown in Figs. 1, 2and 3, with spaced-apart blade holding pins 2 and 3, as indicated in said figures. The back of said blade is provided with a curved widenedbearing 4, depression 5, and striking headv 6. Said blade is also provided with the usual sharp cutting edge 7; I have found by experience-that claw hammers for use of carpenters and others, are made of the same general shape but my considerably in size and contour whereby it becomes necessary to provide supplementary fastening means which is adapted to compensate for such variations as well as any inequalities in the formation of hammer heads of the same make; For this purpose I have provided the spaced apart holding pins 2 and 3, so placed that claws of varying curves and sizes are adapted to be inserted and wedged therebetween with the curved back of the claws bearing against the curved widened bearing 4, so

that when the hammer head 8 is pounded uponany object it forces and wedges the claws of the hammer between said spacedapart pins and tightly against said bearing,

4, whereby itis securely held in position thereon either while using said hammer head or while using the cutting edge of the blade. It will also be noted that theback edge of the blade between bearing 1 and striking head 6 is very thin in order to per mit .it to enter a very narrow slot, such as 10, between the claws 11 and 12, thereby providing further for variation in construction of different claw hammers.

It will be further seen that I providea cutting blade attachment having a recessed back with a curved bearing upon one side of said recessed back and a pair of spacedapart pins arranged one above the other and projecting to each side of said blade attachment at the other side of said recessed back; and that their opposed faces make line contact with the inner and outer faces of the claws, so that a'three-point contact lot) of the blade.

An advantage of this construction is that the holding pins will not only permit claws of varying shapes and sizes to be wedged therebetween but there is no danger of their breaking off or permitting the blade to become loose while in use. This construction permits of the formation of a striking head whereby the cutting blade may be readily used as a chiselfor a cutting operation such as is illustrated inFig. 6, or it may be effectually used as a hand blade as shown in Fig. 10. When the cutting blade is securely mounted in position, as shown in Fig- 1, in

the manner above set :forth, the implement is ready to be used either to perform the ordinary functions of a hammer or hatchet,

as desired, and then when it is desired to use either the hammer claws separately for their customary functions, or to use the cutting blade separately, as in Figs. 6 or 10, said cutting blade can readily be detached in the manner illustrated in Fig. 7.

Thus I have provided a. combination implement whereby the use of a hatchet and also the use of achisel are dispensed with, and accordingly a great saving is effected incost to the user and also he is' enabled to carry this attachment in his pocket, ready for instant use in all emergency orother cases.

Some ofthe advantages of this invention 7 are that it converts the regular claw hamlners into hatchets; enables the user to get into tight places or small places inaccessible to the regular hatchet; may be used as a hatchet, a chisel, or a handblade for cutting or other separate parts and there is nothing.

or slivering; securely holds itself in place without screws, bolts, or other separate parts, and automatically locks itself to the hammer; can be carried in the pocket or under the belt; eliminates the need of carrying a hatchet; and occupies but little space inthe tool kit. It is so simple in its construction that it slides into interlocking engagement automatically with the claws of the hammer without the use of screws, bolts,

to get out of order. When it is once held in the claws of the hammer it remainssecure for delivering the "heaviest of cutting strokes. Hard blows on the hammer cannot loosen the blade but simply serve to wedge necessary no time is lost in searching for the hatchet. p

The 1 Principal advantage of i this invention over prior structures of this kind is its adaptability to hammers of varying sizes and shapes.

The holding pin 2 is secured somewhat nearer to hearing 4 than pin 3 in order that when theclaws ,11 and 12 of the hammer are forced between said pins and against said bearing, it will form a wedging and gripping action of the bearing and pin 3 on one side and of 'pin 20n the other sideof the, claws 11 and 12, respectively, as clearly shown in Fig. 1. a

My invention is capableof some modification without departure from its scope or spirit as defined in the claimsz l/Vhat I claim as new and desire by Letters Patent is to secure 1. A cutting blade attachment having spaced-apart pins adapted to receive the claws of a hammer therebetween and a hearing against which the convex surface ofsaiid claws is adapted to abut, whereby said cut-" ting blade is adapted to. be securely and detachably held in position upon said hammer.

2. A cutting blade attachment having a recessed back with acurved bearing upon one side of said recessed back and a pair of spaced-apart pins arranged one above the a other. and proiecting to each side of .said

blade attachment at the other side of said recessed back, and their opposed faces making line contact with the inner and outer faces of the claws, so that athree-point contact is made with the pair of claws on each side of theblade, substantially as for the purposes set forth.

3. A cuttingblade attachment comprising a body having a cutting edge, a recessed back having athincentral edge Wlthya hearing on one side thereof and with cooperating spaced-apart holding pins projecting from each side of saidbody and a striking head on the other side thereof, all substantially as and for the purposes setforthr.

4. A hammerfihaving' tapering claws spaced apart by a tapering nail extractor slot, in combination with acutting blade attachment comprisinga body having aj sharp edge with a recessed back havinga thin edge adapted to be inserted in said slot and having a bearing adapted to engage said hamme'r and spaced-apartipins .q dapted to receive therebetween the tapering. whereby said blade is adapted to'be mounted on and detachably. secured to hammers of varying sizes and shapes.

JAMES G. nanniue;

claws 

